DVD drive gone bad!?

I have a LG DVD RW drive which worked 5n b4 n from last year it stopped working.....sometimes it reads discs n sometimes nt...n evn da problm gt worsen 4m da last eight months....nw it z nt at all redng any discs

I cntactd retailer 4m whom i bought da systm...he told me tat da laser readr needs to b changd which is costly so bettr 2 go 4 a new one....I was told by my frnd tat update da firmware 4 ur drive b4 going 4 a new one...

dear noble ones!!!wat do u suggest me to do??

Thanks & Regards
Sai Krishna